Which of the following is a solution to the linear-quadratic system:

y=x2+3x−13


y=5


(1 point)
Responses

(−6, 3)
(−6, 3)

(3, 5)
(3, 5)

(6, 5) and (−3, 5)
(6, 5) and (−3, 5)

(3, 5) and (-6, 5)

1 answer

To find the solution to the linear-quadratic system given by the equations:

  1. \( y = x^2 + 3x - 13 \)
  2. \( y = 5 \)

We can substitute \( y = 5 \) into the first equation to find the corresponding \( x \)-values.

Substituting \( y = 5 \):

\[ 5 = x^2 + 3x - 13 \]

Rearranging this gives us:

\[ x^2 + 3x - 18 = 0 \]

Next, we can factor this quadratic equation:

\[ (x + 6)(x - 3) = 0 \]

Setting each factor to zero gives us:

\[ x + 6 = 0 \quad \Rightarrow \quad x = -6 \] \[ x - 3 = 0 \quad \Rightarrow \quad x = 3 \]

The solutions for \( x \) are \( x = -6 \) and \( x = 3 \). Since \( y = 5 \), we can now write the solutions as points in the coordinate system:

  1. \( (-6, 5) \)
  2. \( (3, 5) \)

Now, looking at your choices, the correct response is:

(3, 5) and (-6, 5)